Tube-expanding device.



No. 629,354. Patented My 25; 1899.

--r. a. nmrsou. TUBE EXPANDIIGVDEVICE.

4 Shaets8heet I (No Model.)

(Application filed Jan. 5, 1899.)

ww E f Nu. 629,354. Patented July 25, I899.

r. a. HAMPSON.

TUBE EXPANDING DEVICE.

(Application filed Jan. 5, 1899.)

4-Sheets-Sheet 2.

(No Model.)

No. 629,354. Patented July 25, i899. F. G. HAMPSUN.

TUBE EXPANDING DEVICE.

(Application filed Jan, 5, 18994 3 l B e h A S t 8 e .h s 4 (No Model.)

ms nu nms PETER! cc. mam-mun, wan-mam No. 629,354. Patented m 25, I899.

' F. e. HAMPSON.

TUBE EXPANDING DEVICE.

A neamn Bled Ian. 5, 1899.

4 Sheets-Sheet 4.

(-No Model.)

1m: npnms mas co, FHOTO-LITNQ. wumnumn. o. c.

UN TE -"STA S TE Q FIQE FRANK-"GEORGE 11AMPsoN,-oF SHOREHAM, ENGLAND}, i

u B's-EX P u 'o'evlo 1 1 srxc'rricnrrorrrermin m 'of Letters mam -629,354, dated July 25, 1899'. I b pplicationfiled ianuary'5,1839. s a ing. 701,247. some.) I

7 To all whom it inay cOnceJct,-Qj

Be it'knownthat I, FRANK GEORGE H Mr f SON, a subject offthe-Queen of England, re-

siding at Shoreharn, Sussex county, England,

. have invented certain new and'useful 1m; v provements.inor Relating to Tube-Expanding, .(fo'r which I- have made application for Letters Patent in" Great Britainnnder'Nol 12,752, dated June-7,,1898,) of which the 'fol-' lowing is a specification. This invention relates one tube into another or into a tube-plateor' the like, and although it is applicable in accessible places and for large sizes of tubes as well as sinall 'it is particularly suitable for expanding Very srhalltubes in inaccessible places, and I will now describeit in that application.

Hitherto in thecase of boilers having many small tubes connected with drums or larger tubes great difficulty has been experienced in expanding the ends of the smaller tubesin the holes in the larger ones, and the choice of the sizes 'of tubes whichcould thus be used has been practically limited by reason of this difficulty.

A'tube-expander constructed according to this invention will enablethe ends of small tubes to be expanded into holes in the wall of a drum or larger tube or chamber whose dimensions are limited to such an extent that the .use of the ordinary type of tube-expander within it would be impossible or impractica-- ble. It is herein describedwith reference to the accompanying drawings, in Which Figure 1. is a longitudinal central section.

of the completeexpanderin position within a the drawings.

tube. in. readiness to expand a smaller tubeinto engagement therewith. Figsfl and 3 are views similar to Fig. 1 with the movable parts of the expander in the different positions assumed by them in the operation of the appa-= ratus as hereinafter described. Figit is'a plan of Fig. 1. Fig. 5 is a perspective view-0t the frame 0, hereinafter referredto, with certain of its appurtenances; andFig. 6 is asection on the line 6 6 of Fig. 1. f

Like letters indicate like parts throughout The, body of the apparatus (:0 mprises a shaft A of sufficient length to enable it to pass far enough into the large tube L,'in which'the to the expanding gaged with the parts work-is being executed,to carry it down to the V I place where the smaller. tube L is to be ex=' This shaft supports the apparatus panded.

by'which the actualoperation of'expansion' is'eiiectedpthe axis X Y, about which the exp'ansion-rollers travel, being arranged'at an angle, which preferably, asin'the present ex ample,ii's, a right ang1e,'with the length of. the shaftA andwith the axial lineof: the conf trol and operating mechanism. The end of the shaft opposite to'that at which the expansi'on apparatus is carried supports the handles of the control mechanismby which the'adjust .ment of the expansion apparatus is effected, 'so that it can be controlled and operated from the outer or accessible end of the larger tube L. v

' The expansion apparatus com prises a rollercarriage B, which may be tapered, as shown,-

or not, as preferred, carrying in recesses the expansion-rollers B and adjustable in the direction of the axis X Y in a frame secured to l the shaft A, so that the carriage maybe withdrawn into or protruded from the rest of the apparatus. The frame 0 in the example illustrated is made in twin parts 0 G which abut against each other upon the central plane 1 1,

Fig. 4, of the apparatus, being held together by countersunk screw-studs G and by a plate A, formed on on'eend of the shaftA and en- C (J ,by screws A and by the entry of extensions 0 on the parts 0 0 into a socket A on the shaft-A. The lower portion of the frame thus constituted is approximately semicylindrical in transverse section, as may be seen from Fig. 6, so as to approximately iill one-half of the lower portion of-the larger tn be L, into which the apparatus :is inserted,while the upper portion is narrower, (see Fig. 5,) inclosing the carriage B when the latter is retracted andserving to form a guide for the slides F, which bear against its outer faces, as will be presently explained. I v 'In' each of the parts 0' C a semicircular recess is formed, the two semicircular. recesses when the parts G 0 come together forming a complete circular recess G in which E, D,

and G,hereinafter referred to, are rotatable.- Y

-Thc-carriage B is moved endwise'bydevices which'do not interfere with its, rotation 7 around the mandrel I) when the rollers B are in operation. 0n the carriage B is a ring'E, carried in a circumferential groove B upon the exterior thereof and provided with pins E. These pins are controlled by slides F, adjustable upon the frame 0 in a direction transverse to thatof the axis X Y by a rod F and provided with cam-slots F which are arranged at an angle with the direction of motion of the slides and receive the outer ends of the pins E. In addition to the cam-slots F the plates F are provided with straight slots F arranged parallel with the direction of motion of theplates and engaged by pins 0 which project from the sides of the frame against which the plates hear, so as to keep the plates from riding up or down on the central projection, which they embrace.

Fis a rod by which the plates F can be ad-' justed. This extends into proximity to the handle J.

The mandrel D, which extends into the car'- riage B, is encircled by a bevel-wheel'D, ret ained in arecess 0 in, the frame 0. The wheel is so engaged with the recessed frame as to be free to rotate, but not to have movement in the directionof its axis. That portion D of the mandrel which passes through and in the drawings extends below the bevel wheel D is of angular form in cross-section and passes through an angular hole of corresponding shape in the boss or center of the bevel-wheel, with which it makes a sliding fit, so that while the mandrel D can move endwise easily through the boss of the bevelwheel D to follow up or to recede before the roller-carriage l3 yet the bevel-wheel D cannot be rotated without turning the mandrel with it. The portion D of the mandrel which bears upon the rollers B is coned, and the opposite end D of the mandrel is screwthreaded to engage with a screw-threaded nut G, encircling it. The nut G is journalcd like the bevel-wheel D to turn in the frame 0. It occupies the lower portion of the recess C and contains a sliding bolt H, which can enter recesses D in the face of the bevel-wheel D. Instead of the threaded end D of the mandrel or the bolt I-I there may be other equivalent means by which the nut G can be engaged with or disengaged from the bevelwheel D on the mandrel, against both of which it bears.

J is a spindle journaled in the shaftA and frame 0, with a handle J at its outer end and at its inner end a pinion J engaged with the bevel-wheel D, so that by rotating the handle J the bevel-wheel D and mandrel D can be turned.

K is a rod movable endwise in the frame 0. This rod is employed to bolt the nut G to the frame 0 C 0 through which the rod passes, and also to operate by means of its coned or beveled inner end K the sliding bolt H, with the beveled portion H of which it engages.

H is a spring by which the bolt H is normally kept in such a position that it looks the .the small tube L, as shown in Fig. 3.

of the rod K permits the bolt H to reengage A the nut G with the bevel-wheel D under the influence of the spring H and leavesthe nut free to turn in the frame 0.

In use the apparatus is passed, with its parts, in the position in which they are shown by Fig. 1 into the main tube L as far as the end of the small tube L,.which is to be expanded, and the roller-carriage B is then protruded, as in Fig. 2, into the small tube L by the slides F, which are moved end wise, so'

that the inclined slots F therein acting upon the pins E, and so upon the ring E, move the carriage B out of the frame 0 from the position in which it is shown in Fig. 1 into that in which it is shown in Fig. 2. \Vhen this has been done, the rod K is moved so as to retract the bolt II and disengage the 'bevel- Wheel D from the nut G, which is simultaneouslylocked by the rod K to the frame 0 0 C Then the spindle Jis rotated to turn by means of the pinion J the bevel-wheel D without the nut in such a direction as to rotate the mandrel D and cause it to screw itself out of the nut G, following up the carriage B and forcing the rollersB against the interior of As soon as the mandrel has been moved out sufficiently far the rod K is moved so as to unlock the nut G from the frame 0 and allow the bolt H to reengage the nut with the bevelwheel D, these two parts G D being subsequently rotated in company by the pinion J to cause mandrel D to turn and force the rollers B to travel-over the inner surface ofthe tube L operated upon and expand it outward in a manner well understood \Vhen the nut G, wheel D, and mandrel rotate in company in this manner, the mandrel of course receives no endwise movement. The nut G is preferably provided with a pointed portion G to engage with the larger tube L to assist in holding or lockin g the apparatus in its proper position therein.

It will be appreciated that the actual details may be greatly varied without departing from the spirit of this invention, and would necessarily be varied according to the nature of the work and its accessibility or otherwise. The foregoing description will serve, however, to indicate how the invention may be carried into effect.

In the place of the shaft A a rod or other form of body may be adopted. Elastic or.

pneumatic apparatus or flexible shafting may be employed for driving the spindle J. The

mandrel D and nut G can be rotated by other 1. In a tube-expander, the combination of.

the supporting-frame, the roller-carriage free to rotate and move endwise therein, means for imparting endwise movement to the carriage, the expanding mandrel arranged cen-' trally of the carriage, and means for rotating the mandrel and moving it endwise, substantially as described.

2. In a tube-expander, the combination of the supporting-frame, the rollercarriage free vto rotateand move endwise therein, means for moving the carriage endwise, the expanding mandrel arranged centrally of the carriage, the nut on the frame engaged by the mandrel, the driving-gear to rotate the mandrel, and means for alternately locking the nut to the frame and gear, substantially as described. I

3. In a tube-expander, the combination of the frame, the rotatable and endwise-movable roller-carriage, the expanding mandrel arranged centrally of the carriage and screw threaded at its inner end, the nut engaging the mandrel, the gear-wheel having a sliding connection with the mandrel, the drivingshaft in mesh with said wheel and arranged at a right angle to the axis of the mandrel, and means for locking the nut to the frame,

substantially as described.

4. In a tube-expander, the combination of the supporting-frame, therot-atable and' endwise-movable roller-carriage thereon ,the slide for reciprocating the carriage, the tapered expanding mandrel arranged centrally of the carriage andscrew-threaded at its inner end,

the nut engaging the mandrel, the gear having a sliding connection with the mandrel, the driving-shaft arranged at a right angle to the axis of the mandrel and engaging said gear, and means for alternately locking the nut, to the frame and gear, substantially as described.

5. In a tube-expander, the frame,the roller-carriage supported thereby,the expanding mandrel arranged centrally ofthe-carriage, the'nut engaging the mandrel, the gear-wheel connected thereto,

the combination of I and bolts for alternately locking the nut to the gear-Wheel and frame, substantially as described.

6. In a tube-expander, the combination of the frame, the endwise-movable and rotatable roller-carriage, the ring loosely engaging the carriage and having lateral pins, the slide provided with inclined ways engaging the pins, the expanding mandrel, and operating means for the latter, substantially as described.

7. In a tube-expander comprising a rollercarriage and mandrel, each adjustable at an angle to' the axis of a support G, A, driving and clutch mechanism to impart rotary and endwise motions to the mandrel for the purpose described. v

8. In a tube-expander the combination with a support 0 A, of a roller-carriage adjustable at an angle with the axis thereof, a nut G, a mandrel engaged therewith, and clutch drivin g-gear which will cause the mandrel to screw into or out of the nut or the two to rotate in company.

FRANK GEORGE HALMPSON.

Witnesses ALFRED J. BoUL'r, HARR B. BRIDGE. 

